1、Will the shadows of houses, leaves and even bird droppings on photovoltaic modules affect the power system?

Answer: shaded photovoltaic cells can act as loads, consuming energy generated by unshaded cells. The shaded cells can heat up and create hot spots, reducing system output and potentially burning out the modules.

2. Will the modules work on rainy or foggy days? Is there a risk of a power outage?

Answer: Solar irradiance is lower on rainy or hazy days, but photovoltaic modules can still generate electricity in low light. The system operates when the modules meet the inverter’s startup conditions. When a distributed grid-connected PV system is not generating electricity, the grid automatically supplies the load, preventing a supply shortage or outage.

3、Is there a power shortage in the winter when it's cold?

Answer: Power generation depends directly on solar irradiance, daylight hours, and the operating temperature of the PV modules. Weaker sunlight and shorter days in winter reduce output compared with summer. However, a distributed photovoltaic system connected to the grid can continue to supply household loads from the grid as long as grid power remains available.

4. Should the photovoltaic system be disconnected during a thunderstorm?

Answer: Distributed photovoltaic systems are equipped with lightning protection, so do not have to be disconnected. In order to ensure safety, it is suggested to disconnect the circuit breaker switch of the bus box and cut off the circuit connection with the PV module, so as to avoid the harm caused by direct lightning that the lightning protection module can not remove. The operation and maintenance personnel should check the performance of the Lightning Protection Module in time to avoid the harm caused by the failure of the Lightning Protection Module.

5. Is grounding the module frames sufficient for lightning protection in a residential photovoltaic system?

Answer: Ground the module frames on the DC side and add DC surge protection for higher installations. AC surge protection is also required on the AC side.

6、How to clean PV modules?

Answer: Rainwater can wash away some dirt without special maintenance. For adhering dirt, wipe gently with a soft cloth and water. Use a soft brush and clean, lukewarm water on the PV module’s glass surface, applying minimal pressure to avoid damage.

7、Is there a risk of electric shock when you wipe with water?

Answer: The source states that wiping with water is safe because photovoltaic systems and modules are insulated and grounded. However, to reduce the risk of electric shock or damage when cleaning modules in high temperatures and strong sunlight, it recommends cleaning in the morning or late afternoon.

8、Do you need to clean the PV module after snow? How?

Answer: Heavy snow accumulation on the modules requires manual removal. Use a soft tool to push off the snow, taking care not to scratch the glass.

9 Can you step on a PV module to clean it?

Answer: modules have a certain load-bearing capacity, but do not step on them during cleaning. Doing so can cause cracks and damage, reducing power generation and module service life.